See also our FAQ - Payment & Shipping.
[1] UPS does not support all geographic areas with these services. In general, the more rural you are, the less likely UPS offers Next Day. If UPS doesn't support Next Day to your area, we will reach out to you via email to remediate. If you don't respond in time we will automatically downgrade the shipping and refund the difference. Finally, we are working with UPS to integrate these exceptions into our checkout process.